Tool



July 8 1924. 1,500,315

I N. c. HALL Filed Jan. 9, 1922 .iatented July 8, 1924.

UNITED STATES l 1,500,315 PATENT OFFICE.

NELSON o, HALL, or oLm, Iowa.

Toon

Application led January 9, 1922. Serial No. 528,006.

To all whom it may comer/n.'

Be it known that I, NELSON C.- HALL, a citizen of the United States,residing at Olin, in the county of Jones and State of Iowa, haveinvented certain new and useful Improvements in Tools, of which thefollowing is a specification.

This invention relates to a valve testing tool and has for its ,objectthe roduction of a simple and efficient tool W ich may be applied overthe valve of an engine, such as an engine used in the Ford type ofautomobiles.

Another object of this invention is the production of a simple andeilicient mechanism for holding the air cup firmly clamped over thevalve in'such a position as tofacilitate the testing of the valve.

fWith vthese and other objects in view the invention consists of certainnovel constructions, combinations, and arrangements of parts as will behereinafter fully described and claimed.

In the drawings:

Figure 1 is a vertical section through a portion of an engine casingshowing the valve in position, the valve testing tool also being shownin connectiontherewith.

Figure 2 is a top plan view of the structure shown in Figure 1.

Figure 3 is a top plan view of a modied form of the invention, showingthe manner in which a clamping lever may be used for the purpose offirmly holding the air cup over the valve.

By referring to the drawings it will be seen that 1 designates theengine casing, which is provided with the usual valve 2 of any suitableor desired construction. The valve 2 is adapted to normally seat uponthe valve seat 3, and the purpose of the present tool is to test thecloseness of the fit between the valve 2 and the seat 3 to determinewhether or not air pumped into the air cup will escape between the valveand the valve seat.

An air cup 4 is used in connection with the present device and this aircup 4 is provided with a concaved channel 5 around the lower edgethereof, for the purpose of receiving a circular rubber or`other gasket6 as clearly shown in Figure 1. The air cup 4 is preferably cup shapedin form but may be carried to suit the desire of the manufacturer so faras the shape is concerned. The cup 4, however, must be made of suitablesize and sha e to fit conveniently over the upper end o the valve seatand must be made larger than the valve port as is illustrated clearly'in Figure '1. The cup 4 is provided 'with an upwardly extending reducedneck 7, this neck 7 being externally threaded at its outer end for thepurpose of receivin a pump hose 8 shown 1n dotted lihnes in Figure 1.

A clamping yoke or plate 9 is fitted over the air cup 4 and this yoke 9comprises a substantially circular central portion havin an aperture 10Jformed centrally thereo through which aperture 10 extends the re.-duced neck 7. The yoke 9 is provided with a pair of laterally extendingarms 11, these arms 11 havin notched ends 12 for the purpose of fittingaround the supporting bolts 13 and under the heads 14vof the bolts 13.These bolts 13 may be threaded into the engine casing as clearly shownin Figure 1 for the purpose of lirmly clamping the yoke 9 down snuglyover the top of the air cup 4 and causing the same to tightly it aroundthe valve port and constitute an air field therearound.

From thev foregoing description it will be seen that air may beconveniently pumped through the holes 8 and through the reduced neck Zwhich is provided with a feedin aperture 15 formed therein. The air. wilthen pass into the cup 4 and the sealing gasket or washer 6 will preventthe escape of air from the cup. The tting of the valve 2vupon the valveseat 3 may then be very easily and conveniently tested.

In the form shown in Figure 3 the usual I cup 4a is employed, but a latlever 16 is used having an aperture 17 formed therein for fitting overthe reduced neck 7 of the cup 4, One end of the lever 16 is adapted tolit under one head bolt 18, the other end 19 of the lever being free tobe pressed downwardly by the operator for the purpose of firmly clamplngthe cup 4a upon the head of the engine 1.

It should be understood that certain detailed changes may be made inthemechanical construction of the device without de arting from the spiritof the invention so ong as these changes fall within the scope of theappended claims. i

1. A valve testing tool comprising an air cup, means for4 admitting air`into a cup, said yoke comprising a plate, said cup proicc provided withe central opening for receivin? said neck, said yoke provided withlatere 1y extending arms having notched ends, and clamping meansengaging the notched ends for clamping the cup over end aroundY thevalve of an engine.

2. A valve testing tool com rising an air cup, means for admitting airlnto said cup, e yoke tting over the' cup for clamping the. same inposition, a sealing gasket cerried by the bottom of the air cup for forming en air tight joint around the bottom of the air cup, said yokecomprising a plete, said cup provided with an air inlet neck, seid yokeprovided with a centrel openin for receiving said neck, seid yokeprovide with `leterelliy extending arms he,

Y 'nente notched ends, and clam ing means eeging the notched ends for camping the cup over and around the valve ofi an ene.

3. A valve testing tool comprising an air cup, means for admitting airinto said cup, a iyoke comprising a plate, seid cu provi ed with an-airinlet neck, said yo e provided with an opening for receiv said neck, andciampmg means engaging seid yoke for clamping the cup over and aroundthevaive of an engine.

in testimony whereof amx my signature in presence of two Witnesses.,

NELSUN C., ii A VWitnesses:

L. S. Menen i: z

